由于地下病虫害发生在土壤深处，普通施药机械的药液难以深入土层，给防治带来困难。
As the soil pests live in the soil depths, the pesticide spraying by ordinary sprayer can't enter into soil, It is very difficult to get rid of them.
由于地下病虫害发生在土壤深处，普通施药机械的药液难以深入土层，给防治带来困难。
As the soil pests live in the soil depths, the pesticide spraying by ordinary sprayer can't enter into soil, It is very difficult to get rid of them.
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